Scale



May L28, 929- A. HALLwooD SCALE Filed Feb. 2, 1927 I wuenf'oz 4 jlfaalzd. Hall W001i s AAA\\ Patented May 28, .1929.

UNrrEDcgsfTA'TEs PATE-NT oFFlcE.

NATHAN A. HLLLWOOD, OF COLUMBUS, OHIO, SIGNOR TO m JACOBS INC., OF BROOKLYN, NEW YORK,

.A CORPORATION OI' NEW YORK.

SCALE.

This invention relates to a functionall :and structurally improvedl scale and spec` cally aims to providea device of this character in which over` `and underweights -will be Vregistered. The invention will be -hereinaifter'fexempliied by an 'even balance type-of-scalein connection with which it is primarily `to be used, but it is to be understood that this fis/not necessarily rthe case.

It is a further object of the invention to provide a scale of the character set forth which will constitute ank improvement upon scales of this general type hitherto employed by first simplifying the construction of the weight indicating mechanism, Vsecond providing a more accurate weight 4reading means and third in reducing the mechanical complications, enabling the scale yto `bereadily manufactured and kept for long periods ofv .time in perfect operation with but a minimum of attention and replacement, adjustment or. breakage of parts.

With these" and other objects in view, as will appear as the description proceeds, the invention consists in the novel features kof construction, combinations of elements and arrangements of parts hereinafter set forth and fully described and pointed out in the ap ended claims.

n the accompanying drawing:

Figure 1 is a front elevation of a scale constructed in accordance with the present int-ention, parts thereof being shown in vertical section,

Figure 2 is a vertical transverse sectional View taken on the line 2-2 of Figure 1, and

MFigures 3 and 4 are front views, partly in vertical section, disclosing modified forms of the invention.

Referring more particularly tothe drawing the numeral 1 designates my improved scale in its entirety. Broadly, the scale comprises a base 2 from which arise supporting bearings 3, which are adapted for the reception of the knife edge fulcrums 4 projecting horizontally from the intermediate portions of a beam 5. The outer ends of the beams carry in the usual manner the equidistantly spaced weight receivers 6, from which depend stems 7 the lower ends of the latter being connected with a pivoted check rod 8, ar-

ers 12 mounted inconnection Application mearebruary 2, .1927. Asenin m. 165,478.

Vranged in the 'base ofthe scaleand extending 4.parallel with the -beam '5.

The weight .indicating mechanism comprises a tower `9, arising from the Abase 2 between the weight receiver 6. The beam 5 is provided with a centrally disposed integral web 10, arranged within the base of the tower. .In this instance the web includes spaced ears `to which are :rigidly secured vthe lower end of ,a resilient strip 11, arranged vertically within the Atower and extending transversely thereof. The upper ortion of the strip lpasses betweena pairfo adjustablefguide rollu witha vertically adjustable carriage 13. The extreme upper end of the -resilient metallic strip 11 is con- 4nected yrigidly with the vlower end of an indicator hand 14, which islmovableover a graduated surface 15 provided in the top ofthe tower 9.

YBy this construction .it will be seen that when the scale is unwcighted, the resilient strip l-l-assunies its normal straight position, holding .the beam in what may be termed its normal position and atthe same time causing 'the outer rend of the hand 14 to maintain itself' -on the zero positions of the graduated surface thereby causing thespring strip 11 to iiex or bow. This is brought about by the fact that `the lower end tof the strip 1l isconnected with the beam .at a position somewhat eccentric to the true horizontal axis, of rotation of the beam. Then, since the upper end portion of vthe spring strip is confined loosely between the rollers 1Q it follows :that the spring will be bowed. The bowing of the spring causes the hand 14 `to traverse' the scale or graduated surface 1'5 so as to provide the scale operator with a reading to de notc the extent of departure of the `beam from the desired normal position. Then the beam, however, is balanced the resiliency of the strip 11 causes the same to regain its straight vertical form and this will be indicated by the position of the outer end of the hand 14 on the graduated surface l5. It will befobserved that the strip is comparatively long and that the bending forces and movements to which the same is subjected are comparatively unimportant from a mechanical standpoint. This enables the strip to be employed for long periods of time without fatigue, strain or wear which would tend to impair the accuracy of the weight indicating mechanism of which the spring forms an essential part. It will be observed that the spring is not subjected to undue torsional strains or twists, but merely to a slight bendforthe reception of a vertically adjusting screw 17, which is swiveled as at 18 in conf nection with the tower. A removable casing 19 is arranged to cover the screw 17 and associated parts, but may be readily removed kvin order to provide access to said screw whenever desired. It will be seen that by rotating the screw 17 the carriage or block will be caused to travel vertically in its associated guides, thereby raising or lowering the rollers 12. This results in providing a control for governing the degree of fiexure of the spring strip and particularly the eX- tent of movement of the upper end of said strip from one side to the other .of the perpendicular plane which said strip normally occupies. This adjustment provides a scale indicating mechanism of a sensitive accurate character and one of very economical form, since extreme accuracy in workmanship in the building of the scale is not required, especially so far as the weight indieating mechanism itself is concerned.

In Figures 3 and et slight modifications of the invention have been set forth. In Figure 3 the' indicating h and 14a, is provided with an enlarged hub 2O arranged for rotation about a fixed axially disposed shaft 21, there being anti-friction devices 22 arranged between the hub and the shaft to permit of frictionless rotation of the hand 14a. The lower side of the hub 20 is provided with a pair of brackets 23,' between which issecured the upper end of the strip 11a, the lower portion of the latter being clamped to the beam 5 in the usual manner. In Figure 4 exactly the same construction is employed as is shown in the preferred form of' t-he invention, set forth in Figures l and 2,' with the exception that instead of employing a pair of spaced guide rollers, as indicated at 12, I use a transverse stud 24 provided with a slot 25 through which the strip 11 extends, the walls of the slot being convex as indicated at 26. The stud 24 may turn about a horizontal axis to relieve possible binding.

In view of the foregoing it will be seen that the present invention provides a scale of simple and economical form, capable of accuratelyy and clearly disclosing the various weighing positions of the beam, and wherein the movement of the hand or pointer of the weight indicating mechanism is multiplied with respect to the degree of movement of the beam. The weight indicating mechanism may be readily adjusted so as to be sensitive and accurate in use, a structure of long life provided and repairs, when necessary, simplified and rendered convenient to effect. Friction has been kept out of the scale to a very considerable extent and error Yfrom this source reduced to a minimum.

Thus, among others, the several objects specifically aforementioned are achieved. It will be understood, however, that numerous changes in construction and re-arrangement of the parts might be resorted to without in the slightest' departing from the spirit of the invention as defined by the claims.

lVhat is claimed is: l

1. In a scale, a base, a pivotally mounted beam arranged on the base, a perpendicular-ly extending spring connected with said beam,

a weight indicator carried by said spring, and an adjustable guide means engaging with said spring at a position spaced from said beam and serving to flex said spring upon oscillating movement Yon the part of said beam.

2..In a scale, a b'ase, a pivotallygmounted beam carried by said base, a flat leaf spring having one end thereof connected with said beam in alignment with the pivotal axis of the' latter, the other end of said spring having fixed connection with a weifrht indicator, and guide means engaging wit i said spring ata position spaced from said beam and serving to flex said spring upon oscillation on the part of said beam.

3. In a sca-le, a beamA pivotallj,7 mounted contiguous to the center thereof, an upright leaf spring having the lower end thereof clamped to said beam contiguous to `the pivotal mounting thereof, the outer end of said spring being formed to include' a weight indicator, and guide means mounted independently of said beam and cooperative with said spring to flex the latter upon movement of said beam from a normal position, the flexingl of said spring servinv to move said indicator over a graduated sur ace.l

4. In a scale, a pivotally mounted even balanced beam, a flexible member extending perpendicularly to said beam and having the lower portion thereof rigidly connected with said beam, the upper end of said flexible member being formed to constitute a weight indicator, and means for coniiningthe upper of staid strip and a member movable in uni- 65 portion of said flexible member to cause flexure thereof upon movement of said beam away from anormal position.

5. In a scale, a pivotally mounted evenly balanced beam, a flexible strip having the lower end thereof secured to said beam contiguous to the axis of rotation thereof, the free end of said strip being formed to comprise a weight indicator, and means admitting of the flexing of said strip when said beam is moved from a predetermined normal position.

6. In a scale, Aapivotally mounted beam structure, a Weight indicating mechanism comprising a flexible strip, and means operating upon delectionof said beam struct-ure from a neutral position to flex said strip, the tree end of said strip being movable over a graduated surface to indicate the departure thereof from a normal position.

7. In a scale, a pivotally mounted even balanced beam, a resilient metallic strip connected at its lower end with said beam in registration with the pivotal center thereof, the upper end of said strip being formed to constitute a Weight indicating member, and a guide structure including a pair of opposed convex Walls between which said strip is passed, whereby upon oscillation of said beam said strip will be flexed to move the Weight indicating member thereof.

8. In a scale, a pivotally mounted even balanced beam, a movable Weight indicator, and a spring strip positioned between said beam and said indicator and adapted to be flexed when said beam is moved from a neutral position, the exure of said spring strip serving `to operate said indicator, said indicator swinging about a horizontal axis.

9. In a scale, a pivotally mounted even balanced beam, a spring strip connected at its lower end to the axial portion of said beam, the free upper end of said strip being formed to include a Weight indicator, and an adjustable guide means engaging with said strip at positions spaced from said beam and serving to admit of the flexing of said strip upon deflection of said beam from a normal predetermined position.

10. In a scale, a pivotally mounted beam, a spring strip connected with said beam, said strip extending perpendicularly to said beam and having the outer end thereof formed to constitute a weight indicator, and an adjustable guide means cooperative with said strip at positions spaced fromv said beam to effeet the flexing of said strip when said beam is moved from a predetermined normal position.

11. In a scale, a pivot-ally mounted even balanced beam, a cheek, a flexible strip, an adjustable guide means engaging -with the strip, and a connection between the lower end son with either said beam or cheek.

12. A scale including a rockingly mounted beam, a flexion strip, means connecting one end of said strip to move with said beam, and substantially lined means movably cooperating with said strip to normally maintain said beam in a predetermined position.

13. A scale including a rockingly mounted beam, a flexion strip, means connecting one end of said strip to move with said beam, substantially ixed means movably cooperating With said strip to normally maintain said beam in a predetermined position and a registering means connected with that .end of the strip opposite to the one which is connected to said beam.

14. A scale including a rockingly mounted beam having a substantially predetermined range of travel and a neutral position, a registering mechanism to measure the amount of deflection of said beam to either side of said neutral position, means connecting said mechanism to said beam and means for varying the range of travel of said registering mechanism to'both sides of the neutral position thereof.

15. A scale including a rockingly mounted beam, a flexion strip, a. registering mechanism connected with said flexion strip, means connecting said beam to said flexion strip and means for varying the amount ofdeflection ofsaid strip under predetermined movements of said beam.

16. A scale including a rockingly mounted beam having a neutral position, a registering mechanism indicating the amount of deflection of said beam to either side of said neutral position, a flexion strip tending normally to maintain said beam in such position and means for varying the range of movement of said registering mechanism.

17. A scale including a rockingly mounted beam, a flexion strip connected thereto, a registering mechanism for measuring the amount of deflection of said beam from a predetermined osition and readily adjustable means movable longitudinally of said strip for varying the latitude of flexion thereof under predetermined movements of said beam.

18.A A scale including a rockingly mounted beam, a flexion strip connected thereto Aand readily adjustable means engaging said strip and movable longitudinally thereof to vary the effective reaction of said strip to movements of the beam.

19. A scale including a rockingly mounted beam having a neutral position, a flexion strip connected to said beam and tending to maintain said beam in neutral position and readily adjustable means engaging said strip to vary the amount of resistance offered thereby to movements of said beam to positions to either side of such neutral position.

20. A scale including a rockingly mounttionsto-,eitlier',sdefofg'suehmeutrl position ed beam having a neutral position, a le-xion and;a*registeringmeehanismfconnected with strip connected to said beam and tending to vsaid'leXion-fstripfto :measureithe amountof 11g maintain said beam in neutral position, delectionofthebeamtogpoionsfto-either 5 readily adjustable means engaging said strip side dfneutral.

to vary the amount of resistance offered VIne#Jestimollywhereof'Ialix'my;sigmaure. thereby to movements of said beam to pos- A. HALLWOOD. 

